XML 121 R93.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Employee Benefits - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Retirement Benefits [Abstract]      
Severance pay liability $ 266,209 $ 258,262  
Deposit with insurance companies 206,752 202,230  
Severance expenses $ 33,355 $ 28,472 $ 32,908